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PSY 315 Week 3 Inferential Research and Statistics Project Part 1 PSY
315 Week 4 Inferential Research and Statistics Project Part 2 PSY 315
Week 5 Inferential Research and Statistics Project Part 3 Presentation
PSY 315 Week 3 Practice Problem Worksheet (Version 7) PSY 315 Week
4 Practice Problem Worksheet (Version 7) PSY 315 Week 1 Practice
Problem Worksheet (Version 7) PSY 315 Week 3 Inferential Research
and Statistics Project Part 1 (PTSD) PSY 315 Week 4 Inferential Research
and Statistics Project Part 2 (PTSD) PSY 315 Week 5 Inferential Research
and Statistics Project Part 3 Presentation (PTSD) PSY 315 Week 2
Practice Worksheet (New, 2018) PSY 315 Week 3 Practice Worksheet
(New, 2018) PSY 315 Week 1 Discussion Question 1 PSY 315 Week 1
Discussion Question 2 PSY 315 week 1 Individual Assignment Research,
Statistics, and Psychology Paper PSY 315 Week 1 Practice Problems
Worksheet PSY 315 Week 2 Discussion Question 1 PSY 315 Week 2
Discussion Question 2 PSY 315 Week 2 Practice Problems Worksheet
PSY 315 week 2 Individual Assignment Ch 1 Practice Problems 12 15 19
20 21 and 22 PSY 315 week 2 Learning team assignment Descriptive
and Inferential Statistics Paper andTeam Charter PSY 315 week 2
Learning team assignment Descriptive and Inferential Statistics
Presentation (New) PSY 315 Week 3 Discussion Question 1 PSY 315
Week 3 Discussion Question 2 PSY 315 Week 3 Practice Problems

Worksheet PSY 315 Week 3 Team Assignment Hypothesis Testing
Lesson Presentation PSY 315 week 3 individual assignment Chapter 2
Practice Problems 11 12 13 16 21 and Chapter 3 Practice Problems 14
15 22 25 PSY 315 Week 4 Discussion Question 1 PSY 315 Week 4
Discussion Question 2 PSY 315 Week 4 Practice Problems Worksheet
PSY 315 week 4 individual assignment Chapter 4 Practice Problems 13
16 and 20 PSY 315 week 4 Learning team assignment Hypothesis
Testing Paper on Psycological reason for Depression PSY 315 Week 4
Team Assignment Research Data Critique PSY 315 Week 5 Discussion
Question 1 PSY 315 Week 5 Discussion Question 2 PSY 315 week 5
Individual Assignment Ch 7 Practice Problem 14, Ch 8 Practice Problem
18, Ch 9 Practice Problem 17 Ch 11 Practice Problems 11,12 PSY 315
Week 5 Individual Assignment Hypothesis Testing Paper PSY 315 Week
5 Practice Problem Worksheet (NEW)
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PSY 315 Week 1 Discussion Question 1
What are the differences between quantitative and qualitative data?
What are some examples of each?
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What are descriptive statistics, and how might you use descriptive
statistics in your personal life?
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PSY 315 Week 1 Individual Assignment Research, Statistics, and
Psychology Paper
1. Individual Assignment: Research, Statistics, and Psychology Paper
Resources: Assigned readings, ERRs, the Internet, and other sources
Prepare a 700- to 1,050-word paper in which you examine the role of
research and statistics in the field of psychology.
Address the following items thoroughly:
o Define research and the scientific method (include an
explanation of all five steps).
o Compare and contrast the characteristics of primary and
secondary data.

o Explain the role of statistics in research. (Keep the focus
within the field of psychology).
Format your paper according to APA standards.
Complete the Certificate of Originality Report and submit to the
Assignments link as an attachment along with this assignment.
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PSY 315 Week 1 Practice Problem Worksheet (Version 7)
Provide a response to the following questions. Written responses should
be at least 30 to 45 words each. 1. Explain and provide an example for
each of the following types of variables: a. Nominal: b. Ordinal: c.
Interval: d. Ratio scale: e. Continuous: f. Discrete: g. Quantitative: h.
Qualitative: 2. The following are the speeds of 40 cars clocked by radar
on a particular road in a 35 miles-per-hour zone on an afternoon: 30,
36, 42, 36, 30, 52, 36, 34, 36, 33, 30, 32, 35, 32, 37, 34, 36, 31, 35, 20
24, 46, 23, 31, 32, 45, 34, 37, 28, 40, 34, 38, 40, 52, 31, 33, 15, 27, 36,
40 Create a frequency table and a histogram. Then, describe the general
shape of the distribution. 3. Raskauskas and Stoltz (2007) asked a group
of 84 adolescents about their involvement in traditional and electronic
bullying. The researchers defined electronic bullying as “…a means of

bullying in which peers use electronics (such as text messages, emails,
and defaming Web sites) to taunt, threaten, harass, and/or intimidate a
peer” (p. 565). The table below is a frequency table showing the
adolescents’ reported incidence of being victims or perpetrators of
traditional and electronic bullying. a. Using the table below as an
example, explain the idea of a frequency table to a person who has never
taken a course in statistics. b. Explain the general meaning of the
pattern of results. 4. Describe whether each of the following data words
best describes descriptive statistics or inferential statistics. Explain your
reasoning. a. Describe: b. Infer: c. Summarize: 5. Compare the three
types of research methods and statistics. 6. Regarding gun ownership in
the United States, data from Gallup polls over a 40-year period show
how gun ownership in the United States has changed. The results are
described below, with the percentage of Americans who own guns given
in each of the 5 decades. a. Are the percentages reported above an
example of descriptive statistics or inferential statistics? Why? b. Based
on the table, how would you describe the changes in gun ownership in
the United States over the 40 years shown? 7. Refer to the Simpson-
Southward et al. (2016) article from this week’s electronic readings.
Was this an example of inferential statistics and research or descriptive
statistics and research? Justify your response.
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The median home price in your area has increased in the last 10 years,
how does this differ from the mean home price in your area? How does
this illustrate what the mean and median are?
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How effective are the pie charts that often accompany a newspaper
article in explaining the statistics being used in the article? Can you find
an example of a pie chart?
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PSY 315 Week 2 Learning team assignment Descriptive and
Inferential Statistics Paper andTeam Charter
1. Learning Team Assignment:Descriptive and Inferential Statistics
Paper & Team Charter: see Rubric in the Course MaterialsForum, Also
post the team charter to the Assignments section with the completed
assignment.

Prepare a 700- to 1,050-word paper in which you examine the
differences between descriptive and inferential statistics.
Address the following items:
o Describe the functions of statistics.
o Define descriptive and inferential statistics.
o Provideat least one example of the relationship between
descriptive and inferential statistics.
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PSY 315 Week 2 Learning team assignment Descriptive and
Inferential Statistics Presentation (New)
Resource: Assigned journal article
Create a 7- to 10-slide presentation with speaker notes examining the
differences between descriptive and inferential statistics used in the
journal article you were assigned.
Address the following items as they apply to the article:
 Describe the functions of statistics.

 Define descriptive and inferential statistics.Provide at least one
example of the relationship between descriptive and inferential
statistics.
Format your presentation consistent with APA guidelines.
Click the Assignment Files tab to submit your assignment.
==============================================
PSY 315 Week 2 Practice Worksheet (New, 2019)
Week 2 Practice Worksheet Provide a response to the following
prompts. 1. The Wilcox &Keselman (2003) article from this week’s
electronic readings discusses two problems with measures of central
tendency: skewness of the data and outliers. Discuss each of these
issues and how they affect measures of central tendency. 2. How do
the sample mean and the population mean differ? What is the symbol
for each type of mean? 3. An expert reviews a sample of 10 scientific
articles (n = 10) and records the following numbers of error in each
article: 0, 4, 2, 8, 2, 3, 1, 0, 5, and 7. 1. Compute the mean, median,
mode, sum of squares (SS), the variance, and the standard deviation for

this sample using the definitional and computational formulas. You may
use Microsoft® Excel® data anlysis to compute these statistics and copy
your output into this worksheet. Explain, to a person who has never
had a course in statistics what you have done. 1. Note the ways in
which the means and standard deviations differ, and speculate on the
possible meaning of these differences, presuming they are
representative of U.S. governors and large corporations’ CEOs in
general. 4. A researcher records the levels of attraction for various
fashion models among college students. He finds that mean levels of
attraction are much higher than the median and the mode for these
data. 5. What is the shape of the distribution for the data in this
study? 1. What measure of central tendency is most appropriate for
describing these data? Why? 5. On a standard measure of hearing
ability, the mean is 300, and the standard deviation is 20. Provide the Z
scores for persons whose raw scores are 340, 310, and 260. Provide the
raw scores for persons whose Z scores on this test are 2.4, 1.5, and -4.5.
6. Using the unit normal table, find the proportion under the
standard normal curve that lies in the tail for each of the follow useing
table starting on page 673 (Hint: Remember to change all percents to
decimals): 1. Z = 1.00 2. Z = -1.05 3.Z = 0 4. Z = 2.80 5. Z = 1.96 7.
Suppose the scores of architects on a particular creativity test are
normally distributed. Using a normal curve table (pp. 673-676 of the
text), what percentage of architects have Z scores 8. above .10? 9.
below .10? 10. above .20? 11. below .20? 12. above 1.10? 13.
below 1.10? 8. A statistics instructor wants to measure the
effectiveness of his teaching skills in a class of 102 students (N = 102).
He selects students by waiting at the door to the classroom prior to his
lecture and pulling aside every third student to give him or her a

questionnaire. 1. Is this sample design an example of random
sampling? Explain. Assuming that all students attend his class that day,
how many students will the instructor select to complete his
questionnaire? 9. Suppose you were going to conduct a survey of
visitors to your campus. You want the survey to be as representative as
possible. 1. How would you select the people to survey? 1. Why
would that be your best method? 10. In a school band, 9 kids play
string instruments, 10 kids play woodwind instruments, 7 kids play
brass instruments, and 4 kids play percussion instruments. 1.What is
the probability that you randomly select a kid who plays a string or
percussion instrument? 1. What is the probability that you randomly
select a kid who does not play a brass instrument?
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What are some terms related to hypothesis testing with which you are
already familiar? What are the five steps of hypothesis testing? Why do
the null and alternative hypotheses have to be mutually exclusive?
==============================================

What is the difference between null and alternative hypotheses
statements in one-tailed and two-tailed tests? What are
significance/alpha levels and how does using a one versus a two tailed
test affect significance levels?
==============================================
PSY 315 Week 3 Inferential Research and Statistics Project Part
1
Select one of the following scenarios based on your particular field of
interest in psychology: • Industrial/Organizational Psychology: o A few
months ago, the upper management at a large corporation decided
they wanted to make major changes in the organization. Leadership is
concerned that employees may be resistant to the change, and they
want to find out if there is a change management method that would
help employees accept change more effectively and keep employee
satisfaction high. Two methods they have considered are the ADKAR
Framework and the Prosci Change Management Methodology. The
company wants to implement a small change in two departments
before they make any major organization changes and would like to
test the methods. The corporation uses the Devine Company to measure
employee satisfaction with an anonymous survey. • Applied Psychology:

o A large medical facility is experiencing too many missed appointments
in its primary and specialty care clinics. The facility has noticed that not
all patients respond well to reminder calls regarding follow-up
appointments. Some patients do not answer calls and do not seem to
respond to voice mail requesting they call the facility. The result is that
many follow up appointments are missed. Management has read
articles that people respond very well to text messages and would like
to see which method provides the least amount of missed
appointments. Missed appointments are tracked in the facility database
on a monthly basis. • General Psychology: o Clinicians at a small clinic
have been introduced to a new method to treat post-traumatic stress
disorder (PTSD) in their clients for veterans. Research indicates that
virtual reality (VR) is a highly effective treatment option for patients
with PTSD. Currently, the clinic uses only cognitive processing therapy
(CPT) with their patients suffering from PTSD. The clinicians would like
to find out whether VR therapy has different results from CPT therapy.
The measure used by the clinic to measure PTSD symptoms is the
Combat Exposure Scale. Both therapies need to be applied for a
minimum of 12 weeks to be effective. Write a 525- to 750-word paper
that addresses the following for your chosen scenario: • Clearly define
the problem or issue you are addressing. Provide a brief background of
any research you have found that might affect your research
hypothesis. • Create a research hypothesis based on the information
provided in each scenario. You will be given a data set with two sets of
interval data (just the numbers, as you must decide what they
represent, such as method A results or method B results). This means
you are going to test one thing against another, such as which method
works best (step 1 of the steps to hypothesis testing). State the null and

research hypotheses. Explain whether these hypotheses require a one-
tailed test or two-tailed test, and explain your rationale. • Describe the
sample you will use. Sample size will be 30 for each group, which will be
provided in your data set. Explain what type of sampling you selected.
You may create your own data set if you want, as it is only
hypothetical—you do not need to collect any data. • Do you think you
would also collect some descriptive data, such as gender, age, or shift?
Why do you think it makes sense to collect descriptive data? Format
your paper according to APA guidelines. Example You have a hypothesis
that two drugs have different effects on lowering anxiety. You would
have anxiety scores for drug A and anxiety scores for drug B (all after 4
weeks of treatment) to run inferential analysis after 4 weeks. • Null
hypothesis is H0: drug A = drug B • Research hypothesis is H1: drug A ≠
drug B • Dependent variable: Anxiety score changed after treatment. •
Independent variable: drug treatment Because you did not state a
direction in your hypotheses (better than or worse than), this will be a
two-tailed test. You are looking for differences in either direction. You
would set your alpha level of .05 and have a sample for each group of
30 people that were volunteers for the study.
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1. On a standard measure of hearing ability, the mean is 300, and the
standard deviation is 20. Provide the Z scores for persons whose raw
scores are 340, 310, and 260. Provide the raw scores for persons whose
Z scores on this test are 2.4, 1.5, and -4.5. 2. Using the unit normal
table, find the proportion under the standard normal curve that lies to
the right of each of the following: a. z = 1.00 b. z = -1.05 c. z = 0 d. z =
2.80 e. z = 1.96 3. Suppose the scores of architects on a particular
creativity test are normally distributed. Using a normal curve table (pp.
477–480 of the text), what percentage of architects have Z scores a.
Above .10? b. Below .10? c. Above .20? d. Below .20? e. Above 1.10? f.
Below 1.10? g. Above -.10? h. Below -.10? 4. A statistics instructor
wants to measure the effectiveness of his teaching skills in a class of 102
students (N = 102). He selects students by waiting at the door to the
classroom prior to his lecture and pulling aside every third student to
give him or her a questionnaire. a. Is this sample design an example of
random sampling? Explain. b. Assuming that all students attend his
class that day, how many students will the instructor select to complete
his questionnaire? 5. Suppose you were going to conduct a survey of
visitors to your campus. You want the survey to be as representative as
possible. a. How would you select the people to survey? b. Why would
that be your best method?
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===
PSY 315 Week 3 Practice Worksheet (New, 2019)

Week 3 Practice Worksheet Provide a response to the following
prompts. Note: Each team member should compute the following
questions and submit them to the Learning Team forum. The team
should then discuss each team member’s answers to ascertain the
correct answer for each question. Once your team has answered all the
questions, submit a finalized team worksheet. 1. When a result is not
extreme enough to reject the null hypothesis, explain why it is wrong to
conclude that your result supports the null hypothesis. 2. List the
five steps of hypothesis testing and explain the procedure and logic of
each. 3. A researcher wants to know whether people who regularly
listen to radio talk shows are more or less likely to vote in national
elections than people in general. 1. State the research hypothesis
and null hypothesis 1.Would the researchers use a one- or two-tailed Z
test? 4. The general population (Population 2) has a mean of 30 and
a standard deviation of 5, and the cutoff Z score for significance in a
study involving one participant is 1.96. If the raw score obtained by the
participant is 45, what decisions should be made about the null and
research hypotheses? 5. One hundred people are included in a study
in which they are compared to a known population that has a mean of
73, a standard deviation of 20, and a rectangular distribution. 1. μM =
__________. 2. σM = __________. 3. The shape of the comparison
distribution is __________. 4. If the sample mean is 75, the lower
limit for the 99% confidence interval is __________. 5. If the sample
mean is 75, the upper limit for the 99% confidence interval is

__________. 6. If the sample mean is 75, the lower limit for the 95%
confidence interval is __________. 7. If the sample mean is 75, the
upper limit for the 95% confidence interval is __________. 6.A
psychology professor of a large class became curious as to whether the
students who turned in tests first scored differently from the overall
mean on the test. The overall mean score on the test was 75 with a
standard deviation of 10; the scores were approximately normally
distributed. The mean score for the first 20 students to turn in tests was
78. Using the .05 significance level, was the average test score earned
by the first 20 students to turn in their tests significantly different from
the overall mean? 1. Use the five steps of hypothesis testing. 1.
Figure the confidence limits for the 95% confidence interval.
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PSY 315 Week 3 Team Assignment Hypothesis Testing Lesson
Presentation
Prepare a 7- to 10-slide Microsoft PowerPoint Presentation with
speaker notes, as a lesson to explain the null and alternative hypothesis
and how to use a z-test to test the null hypothesis.
Provide an example to illustrate your lesson.

Include a minimum of 1-2 peer-reviewed resources as references.
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What is a t-Test? How is the t-Test different from what we learned last
week? What is the normal distribution and how does it relate to the t-
test? What is an example of a situation in which you would use a t Test
for dependent means?
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What is the theory underlying the ANOVA? Why is it important? What
are the differences between a two sample t-test and ANOVA hypothesis
testing? What is an example of a research idea that would need to be
analyzed using an ANOVA?
==============================================

2
Analyze the data from Part 1 using Microsoft® Excel® software. Write a
700- to 875-word paper that includes the following information: •
Describe what method you are using to compare groups. • Copy and
paste the output into a Microsoft® Word document, and also answer
the following questions: o What is the significance level of the
comparison? o What was the alpha level you identified in Week 3? o
What was the means and variance for each variable? o What was the
test statistic? o What was the critical value for both the one- and two-
tailed test? o Was your test one-tailed or two-tailed? o Were you able
to reject the null hypothesis? In other words, did you prove there was a
difference? • Talk about what these results mean in everyday language
and in context to your chosen scenario. • Make a recommendation
based on the findings. Format your paper according to APA guidelines.
Example of Output You Would Use to Answer These Questions
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PSY 315 Week 4 Learning team assignment Hypothesis Testing
Paper on Psycological reason for Depression

1. Learning Team Assignment: Hypothesis Testing Paper
Select a research issue, problem, or opportunity in the field of
psychology.
Obtain instructor approval for your research issue, problem, or
opportunity before completing your Hypothesis Testing Paper.
Prepare a 1,050- to 1,750-word paper in which you formulate a
hypothesis based on your selected research issue, problem, or
opportunity. See the rubric in the Course Materials forum.
Address the following:
o Describe your selected research issue, problem, or
opportunity.
o Formulate both a numerical and verbal hypothesis
statement concerning your selected research issue, problem,
or opportunity.
o Explainhow the five steps of hypothesis testing were
carried out for analyzing your data, and how the five steps of
hypothesis testing may be used to evaluate other solutions for
your selected research issue, problem, or opportunity.

2. Learning Team Assignment: Hypothesis Testing Presentation
Resources: Assigned readings, ERRs, the Internet, and other
sources
Prepare a 10- to 15-slides (not including the title and
reference slides) Microsoft®
PowerPoint®
presentation with
presenter notes illustrating your Hypothesis Testing Paper.
(Remember the title and references slides do not count
towards the needed total slide count). Follow the rubric
provided in the Course Materials forum.
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1. Two boats, the Prada (Italy) and the Oracle (USA), are competing for
a spot in the upcoming America’s Cup race. They race over a part of the
course several times. The sample times in minutes for the Prada were as
follows: 12.9, 12.5, 11.0, 13.3, 11.2, 11.4, 11.6, 12.3, 14.2, and 11.3. The
sample times in minutes for the Oracle were as follows: 14.1, 14.1, 14.2,
17.4, 15.8, 16.7, 16.1, 13.3, 13.4, 13.6, 10.8, and 19.0. For data
analysis, the appropriate test is the t test: two-sample assuming unequal
variances. The next table shows the results of this independent t test. At
the .05 significance level, can you conclude that there is a difference in

their mean times? Explain these results to a person who knows about the
t test for a single sample but who is unfamiliar with the t test for
independent means. 2. The Willow Run Outlet Mall has two Haggar
Outlet Stores, one located on Peach Street and the other on Plum Street.
The two stores are laid out differently, but both store managers claim
their layout maximizes the amounts customers will purchase on impulse.
A sample of 10 customers at the Peach Street store revealed they spent
the following amounts more than planned: $17.58, $19.73, $12.61,
$17.79, $16.22, $15.82, $15.40, $15.86, $11.82, $15.85. A sample of 14
customers at the Plum Street store revealed they spent the following
amounts more than they planned when they entered the store: $18.19,
$20.22, $17.38, $17.96, $23.92, $15.87, $16.47, $15.96, $16.79, $16.74,
$21.40, $20.57, $19.79, $14.83. For data analysis, a t test: two-sample
assuming unequal variances was used. At the .01 significance level, is
there a difference in the mean amount purchased on an impulse at the
two stores? Explain these results to a person who knows about the t test
for a single sample but who is unfamiliar with the t test for independent
means. 3. Fry Brothers Heating and Air Conditioning, Inc. employs
Larry Clark and George Murnen to make service calls to repair
furnaces and air conditioning units in homes. Tom Fry, the owner,
would like to know whether there is a difference in the mean number of
service calls they make per day. Assume the population standard
deviation for Larry Clark is 1.05 calls per day, and 1.23 calls per day
for George Murnen. A random sample of 40 days last year showed that
Larry Clark made an average of 4.77 calls per day. For a sample of 50
days, George Murnen made an average of 5.02 calls per day. At the .05
significance level, is there a difference in the mean number of calls per
day between the two employees? What is the p-value? Chapters 11 & 12
1. A consumer organization wants to know if there is a difference in the
price of a particular toy at three different types of stores. The price of

the toy was checked in a sample of five discount toy stores, five variety
stores, and five department stores. The results are shown below. An
ANOVA was run and the results are shown below. At the .05
significance level, is there a difference in the mean prices between the
three stores? What is the p-value? Explain why an ANOVA was used to
analyze this problem. 2. A physician who specializes in weight control
has three different diets she recommends. As an experiment, she
randomly selected 15 patients and then assigned 5 to each diet. After
three weeks the following weight losses, in pounds, were noted. At the
.05 significance level, can she conclude that there is a difference in the
mean amount of weight loss among the three diets? An ANOVA was run
and the results are shown below. At the .01 significance level, is there a
difference in the weight loss between the three plans? What is the p-
value? What can you do to determine exactly where the difference is?
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What is a correlation? What are the different types of correlation
research? Why is it important to determine correlation? How is the
strength of a correlation determined?
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If anxiety and depression are correlated, what three possible directions
of causality might explain this correlation?
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PSY 315 Week 5 Individual Assignment Hypothesis Testing
Paper
Resource: Instructor approved research issue, problem, or opportunity
in the field of psychology
Prepare a 1,400- to 1,750-word paper in which you formulate a
hypothesis based on your selected research issue, problem, or
opportunity.
Address the following:
 Describe your selected research issue, problem, or opportunity.
 Formulate a hypothesis statement concerning your selected
research issue, problem, or opportunity.
 Determine your population and describe which sampling method
you would use to generate your sample

 Describe how you would collect your data, the level of
measurement of your data and which statistical technique you
would use to analyze the data. Explain why you chose that
statistical technique.
Include a conclusion of your anticipated findings.
Format your paper consistent with APA guidelines.
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3 Presentation
Create a 12- to 15-slide presentation using the information you
gathered and submitted in Weeks 3 & 4. Include the following: •
Describe the problem, and provide some brief background about the
situation. • Explain the research hypothesis. • Describe your sample and
your sampling method. • Explain the four steps of the research process
you followed, and define the critical value and the test statistic your

analysis provided. • Provide the main finding of the study. What did you
prove or fail to prove? • Provide recommendations based on your
findings. Format any citations in your presentation according to APA
guidelines.
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Provide a response to the following questions. Note: Each team member
should compute the following questions and submit them to the Learning
Team forum. The team should then discuss each team member’s answers
to ascertain the correct answer for each question. Once your team has
answered all the questions, submit a finalized team worksheet. Your
research team has been tasked with finding the correlation of the
following scenario: Four research participants take a test of manual
dexterity (high scores mean better dexterity) and an anxiety test (high
scores mean more anxiety). The scores are as follows: Person Dexterity
Anxiety 1 1 10 2 1 8 3 2 4 4 4 -2 Describe the process your research
team would go through by completing the following: 1. Create a scatter
diagram of the scores, which should be a negative direction. 2. Describe
in words the general pattern of correlation, if any. 3. Figure the
correlation coefficient. 4. Explain the logic of what you have done,

writing as if you are speaking to someone who has never heard of
correlation (but who does understand the mean, standard deviation, Z
scores, and hypothesis testing). 5. Provide three logically possible
directions of causality, indicating for each direction whether it is a
reasonable explanation for the correlation in light of the variables
involved. Explain why.
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